gcp_project_id = attribute(:gcp_project_id, default: '<%= external_attribute(pwd, 'gcp_project_id') -%>', description: 'The GCP project identifier.')
gcp_zone = attribute(:gcp_zone, default: '<%= external_attribute(pwd, 'gcp_zone') -%>', description: 'GCP zone name')
instance_group = attribute('instance_group', default: <%= JSON.pretty_generate(grab_attributes(pwd)['instance_group']) -%>, description: 'Instance group')